Hoisting apparatus



A. conm'. HOISTINGAPPARATUS. APPLICATloN. FILED ocr. 1S. `1919 PatentedApr. 12, 192:1.

WIT/VESSES UNirED STATES ANNIE GLTRY, 0F NORTH PLATTE, NEBRASKA.

HOISTING APPARATUS.

Application filed October 18, 1919.

To @ZZ whom t may concern Be it known that I, ANNIE GOLTRY, a citizen ofthe United States, residing at North Platte, in the county of Lincolnand State of Nebraska, have invented certain new and useful Improvementsin Hoisting Apparatus, of which the following is a specification.

My invention relates to hoisting apparatus and more particularly to thattype of devices which may be effectively employed as a log jack forelevating logs whereby they may be sawed or otherwise treated.

' An important object of my invention is to provide a device includingmeans whereby a load may be elevated and retained in said position.

Another important object of the invention is to provide a device of thisnature which includes means whereby the grapple may be automaticallylowered from its elevated position.

Another object of the invention is to provide a device of the abovenature including means whereby the load is securely gripped and held inthis manner while it is elevated.

A still further object of the invention is to provide a device of theabove nature which is strong, durable, comparatively inexpensive tomanufacture, and is highly efficient in practice.

Other objects and advantages of the invention will become apparentduring the course of the following description.

In the accompanying drawings v Figure 1 is a side elevation of the invention in use, parts of the same being broken away, and Q Fig. 2 is an endelevation of the same.

In the drawings, wherein for the purpose of illustration is shown apreferred embodiment of the invention, the numeral 3 designates a framein general, which consists of a' pair of vertically arranged archedmembers 4, retained in spaced parallel relation by spacing elements 5,some of which consist of bolts while others are sleeves, the latterbeing mounted upon elements .to be hereinafter described. The lower ends6 of the arched members 4 are extended outwardly of the members to beconnected by bars 7.

A lever 8, substantially ogee in configuration is pivotally mountedadjacent its inner end, upon a shaft or bolt 9, and is retained inspaced relation between the arched mem- Specication of Letters Patent.

Patented Apr. 12, 1921.

Serial No. 331,626.

bers 4 by spacing elements 5. 'As will be seen in Fig. 2 of the drawing,this lever is mounted upon the shaft 9 adjacent one of the archedmembers 4 whereby the operating mechanism for the lever may be disposedadjacent the co-acting arched member, as more clearly shown in F ig. 2to permit eiiicient operation of the various` parts of the invention.

A grapple or lazy-tongs 10 is employed to grip the load, and the upperends of the lazy-tongs are connected with the inner end of the lever 8through the medium of links 11, whereby a firm grip is obtained upon theload by the lazy-tongs to prevent accidental dislocation.

The outer end of the lever 8 extends a substantial distance beyond theframe 3 to be connected at its outermost end with a cable 12, which iswound and secured upon a drum 13 journaled upon a shaft 14, whichconnects the lower end of the arched members 4 upon one side of theframe. A sprocket wheel 15 is secured to the drum 13 adjacent one Vofthe arched members 4 and meshes with a smaller sprocket wheel 16 securedto a shaft 17 mounted transversely through the arched members the properdistance above the shaft 14. Each face of the sprocket wheel 16 'isequipped with a disk 18 of the same diameter as the sprocketwheehwhereby these disks prevent disengagement of the sprocket wheel 16with the wheel 15. As is customary. the spacing elements 5 are mountedupon the shaft 17 upon each side of the sprocket wheel 16 whereby it isretained in its proper position to effectively engage its co-actingsprocket wheel. The shaft 17 is equipped withv a crank 19 to permit theoperator to easily operate the lever operating mechanism. A gravity pawl20 is pivot- .ally mounted upon a bracket 21 secured to the framedirectly above the sprocket wheel 16 whereby the working end of the pawl20 normally engages the-teeth of the sprocket wheel 16. This paw] 20prevents retrograde movement of the sprocket wheel 16 but when it isdesired to permit such movement of the sprocket wheel 16 thehandle 22 ofthe pawl is engaged, which action `disengages the working end of thepawl.

When the grapple is in an elevated position and it is desired toautomatically return the same to the ground for engagement with theload, the pawl 2O is disengaged from the sprocket wheel 16 to permitreaction of tance beyond the center oiC the lazy tongs,

and it extends upwardly oit the iframe a substantial Vdistance so thatby connecting oneend of the spring 23 to the uppermost edge of thisbracket, the spring will have a greater effect upon the lever 8 duringthe reaction ot the spring.v

In operation, it will be nanilfest that the spring 23 normally retainsthe various parts of the invention in suchposition that the grapple orlazy-tongs l0 are always in a position to receive a load or log.Consequently the lazy-tongs are first adjusted to ei'ectively grip theload, after which the crank 19 is actuated to impart a clockwiserotation to the sprocket wheel 16, which in turn imn parts a counterclockwise .movement to the larger sprocket wheel l5. As the drum 13 isrotated with the sprocket' wheel l5, it will be manifest that the cablel2 will be wound thereon and consequently the outermost end of the lever8 will b'e moved downwardly causing its inner end to ascend and thecoill spring 23 to expand. Ot course7 the links 1l and lazy tongs lOwill be elevated together with the load, while the working end of thepawl 20 slips over the teeth of 'the sprocket wheel 16. Y'When the loadhas been elevated to the desired height, its descension is `prevented bythe pawl 20 engaging the sprocket wheel 16. However, after the load Yhas been treated or the loo sawed the working end of the pawl 20 may bedisengaged from the sprocket wheel 16 thereby permitting ready reactionof the coil spring 23 and the pivotal movement of the lever S to re-Vturn the grapple to the ground.

The foregoing description and accompanying drawings have reference towhat sions, et cetera, as may prove expedient and e tall within thescope of the appended claims.

'Havingthus fully described my invention what l claim as new and desireto Ysecure by Letters Patent, is

l. fr hoisting apparatus comprising a frame, a lever pivoted adjacentone end to the trame.y grapple means connected to the ond ot the leveradjacent its ulcrum7 means connected with the other end or the lever'for actuating the same, and means tor automatically lowering thegrapple means.

2. ne hoisting apparatus comprising a Ytrame7 a lever pivoted adjacentone end to the frame, grapple means connected to the end or" the leveradiacent its i'ulcrum, means connected to the outer end or" the leverYtor actuating the same, and a coiled spring having one end connected tothe lever and .its opposite end connected to the trame' i'orautomatically lowering the grapple.

3. A hoisting apparatus comprising a frame, a lever pivoted adjacent oneend to the trame, grapple means connected to the end ot the leveradjacent its tulcrum, means connected with the other end of 'the leveryigor actuating the same, an arm secured to the frame and projectingabove the ulcrum of the lever, yand a coiled spring having one endconnected to the lever and its opposite end connected to the free end otsaid arm er automatically lowering the grapple.

ln testimony where it l :fl'lix my signature iu presence of twowitnesses.

ANNUL GOLTRY

